Field Wiring
Original instructions
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Overview
The BMXERT1604T/H module uses one 28-pin terminal block (BMXFTB2820 or BMXFTB2800). This section describes the terminal pinning and wiring examples.
Field Sensors
The 16-channel discrete input support sensor signals from mechanical switching devices (operating in normal environmental conditions) such as relay contacts, limit switches, push buttons, 3-wire, and 2-wire proximity switches.
The sensor interface of BMXERT1604T/H module is designed base on the following rules:
Rank
Input Type
24 Vdc
IEC type 2
48 Vdc
IEC type 3
60 Vdc
110 Vdc
UOFF(max) = 22 V; UON(min) = 79 V; UON(max) = 138 V
IOFF(max) = ION(min) = ION(max) ≈ 1.2 mA
125 Vdc
UOFF(max) = 25 V; UON(min) = 91 V; UON(max) = 156 V
IOFF(max) = ION(min) = ION(max) ≈ 1.25 mA
Time Code Sources
IRIG-B 004/5/6/7: The module receives external time codes in the IRIG-B 004/5/6/7 format through terminal block.
For detailed description of IRIG-B 004/5/6/7 format, refer to the IRIG Standard 200-04.
The physical signal of the time receiver output must be 5 Vdc differential type.
The specifications for the external transmitter are as follows:
  • 1 external source is allowed to drive up to 32 BMXERT1604T/H modules.
  • The minimum required level is 200 mV to activate the BMXERT1604T/H module.
  • IEEE1344 or IEEE C37.118 standard extension definition for DST information must be supported in order to maintain time accuracy during the switch between daylight saving time and standard time.
DCF77: The module receives external time codes in the DCF77 format through terminal block.
For detailed description of DCF77 format, refer to the DCF77 standard.
The required output level from external DCF77 source is 24 Vdc and follows the rules as such:
  • The transition level between mark and space is about 13 Vdc
  • The current consumption is about 3.6 mA (at 24 Vdc) for the DCF77 input port of each module
  • 1 external source is allowed to be wired to multiple modules (the upper limit depends on the current capability of the source)
Pin Assignment
The following table defines the pin assignment for the 28-pin terminal block:
Definition
Pin Number
Definition
DCF_IN
2
1
IRIG+
DCF_COM
4
3
IRIG-
NC
6
5
NC
I1
8
7
I0
I3
10
9
I2
I5
12
11
I4
I7
14
13
I6
I9
16
15
I8
I11
18
17
I10
I13
20
19
I12
I15
22
21
I14
NC
24
23
NC
UB+
26
25
0 VDC
UB+
28
27
0 VDC
WARNING
UNEXPECTED BEHAVIOR OF APPLICATION
The wrong wiring will cause death, serious injure, or equipment damage.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Wiring Diagram
The following figure shows the wiring diagram of the BMXERT1604T/H module.
NOTE: The field power supply connected to UB+ and 0 VDC pins is an auxiliary power supply (different from the main power supply).
CAUTION
LOSS OF INPUT FUNCTION
The power supply to the sensors for I0...I15 must be wired to UB+ and 0VDC pins even if the supply monitoring function is not needed.
Failure to follow these instructions can result in injury or equipment damage.
Fuses
Internal
None
External
Fast blow fuse of 0.5 A
CAUTION
LOSS OF INPUT FUNCTION
Install the correct rating and type of fuse.
Failure to follow these instructions can result in injury or equipment damage.